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Scientific Name Common Name(s) Plant Category Image
Ruta graveolens Rue Herbs, Poisonous Plants
Sambucus canadensis American elder, American elderberry, Elderberry Native Plants, Poisonous Plants, Shrubs
Sambucus pubens Red elderberry, Red-berried elder, Scarlet elder, Scarlet elderberry Native Plants, Poisonous Plants, Shrubs, Trees
Sanguinaria canadensis Bloodroot Native Plants, Perennials, Poisonous Plants, Wildflowers
Sansevieria trifasciata Mother-in-law's tongue, snake plant Poisonous Plants
Sapindus drummondii Soapberry Poisonous Plants
Sapium sebiferum Popcorn Tree Poisonous Plants
Saponaria officinalis Soapwort, bouncing-bet Herbs, Perennials, Poisonous Plants, Wildflowers
Sassafras albidum Sassafras Native Plants, Poisonous Plants, Trees
Scadoxus multiflorus African blood lily, Blood lily, powderpuff lily Poisonous Plants, Summer Bulbs
Schefflera spp. Australian umbrella tree, Schefflera, starleaf Poisonous Plants, Trees
Scilla campanulata (Endymion, Hyacinthoides) Spanish Blue-Bells, Wood Hyacinths Perennial Bulbs, Poisonous Plants, Spring Bulbs
Scilla siberica, S. tubergeniana Siberian Squill Poisonous Plants, Spring Bulbs
Scilla siberica, S. tubergeniana (S. mischtschenkoana) Siberian Squill Perennial Bulbs, Poisonous Plants
Scilla spp. Cuban lily, Siberian squill, Tubergen squill, Two-leaved squill, autumn scilla, blue squill Poisonous Plants
Scleroderma aurantium Earthball, Pigskin Poison Puffball Poisonous Plants
Scleroderma geaster Dead Man's Hand, Devils Snuff Box, Earthstar Scleroderma Poisonous Plants
Sedum 'Autumn Joy' Autumn Joy Sedum Perennials, Poisonous Plants
Sedum 'Matrona' Matrona stonecrop Groundcover, Poisonous Plants
Sedum acre Biting stonecrop, Gold-moss, Stonecrop Groundcover, Poisonous Plants
Sedum album White stonecrop Groundcover, Poisonous Plants
Sedum cauticola Groundcover, Poisonous Plants
Sedum kamtschaticum Kamschatka sedum, Orange stonecrop Groundcover, Poisonous Plants
Sedum lineare 'Variegatum' Variegated stonecrop Groundcover, Poisonous Plants
Sedum makinoi Groundcover, Poisonous Plants
Sedum middendorf Stonecrop Groundcover, Poisonous Plants
Sedum sieboldii October daphne Groundcover, Poisonous Plants
Sedum spectabile Ice plant, Showy stonecrop Groundcover, Poisonous Plants
Sedum spp. Sedum, Stonecrop, roseroot Groundcover, Perennials, Poisonous Plants
Sedum spurium Creeping stonecrop, Two-row stonecrop Groundcover, Poisonous Plants
Sedum spurium 'John Creech' John Creech sedum Groundcover, Poisonous Plants
Sedum ternatum Mountain stonecrop, Three-leaved stonecrop, Wild stonecrop Groundcover, Native Plants, Poisonous Plants, Wildflowers
Sedum tetractinum Chinese sedum Groundcover, Poisonous Plants
Sempervivum spp. Houseleek, live-forever, stonecrop Poisonous Plants
Senecio aureus Golden ragwort Poisonous Plants, Wildflowers
Senecio cineraria Dusty miller Annuals, Poisonous Plants
Senecio spp. Senecio, groundsel, squaw weed Poisonous Plants
Sesbania punicea (Daubentonia punicea) Rattlebox, false poinciana, purple sesbane Poisonous Plants
Skimmia japonica Japanese skimmia Poisonous Plants, Shrubs
Solandra spp. chalice vine, trumpet flower Poisonous Plants, Vines
Solanum americanum Nightshade Herbs, Poisonous Plants
Solanum carolinense Horse nettle, wild tomato Poisonous Plants, Wildflowers
Solanum dulcamara Bittersweet, Deadly nightshade, European bittersweet, climbing nightshade Poisonous Plants, Vines
Solanum nigrum Black nightshade Poisonous Plants
Solanum pseudocapsicum Jerusalem cherry Perennials, Poisonous Plants
Solanum tuberosum Potato, irish potato, white potato Poisonous Plants
Solenostemon scutellarioides Coleus, painted nettle Annuals, Poisonous Plants
Sophora secundiflora Mescal bean Poisonous Plants
Sorghum halepense Johnsongrass Poisonous Plants
Sparmannia africana African hemp Poisonous Plants